<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			var a="true";
			var b=true;
			alert(a==b);
			var i="55",j=55;
			alert(i===j);
			var pi=3.14;//parseFloat(prompt("输入"));
			switch(pi){
				case 3.14:
				 alert("圆周率");
				 break;
				default:
				 alert("其他");
				 break;
			}
		</script>
	</head>
	<body>
	</body>
</html>
